CLARK, Raymond M. Function Approach. Journal of Agricultural Education, [S. l.], v. 10, n. 1, p. 16–19, 1969. DOI: 10.5032/jaatea.1969.01016. Disponível em: https://jae-online.org/index.php/jae/article/view/1515. Acesso em: 13 jul. 2024.